San Francisco County, CA — Planting Guide
Your May planting checklist for San Francisco County, California
If you only do a handful of things in the garden this May, make it these. They're sequenced around your zone's frost timing.
-
Collect basil, carrots, and cucumber at their peak
Morning harvests are best — cooler temperatures mean crisper produce and longer fridge life.
To set up a strong June, finish these tasks
- First harvests: basil, cucumber, and green beans
San Francisco County is in USDA Zone 10b. The average last spring frost is February 23 and the first fall frost is November 27, giving you a growing season of approximately 278 days.
At an elevation of 412 ft, San Francisco County receives approximately 13.5 in of rainfall annually. Summer highs average 86°F with winter lows around 58°F. The predominant soil type is Loam.
Based on 29 years of NOAA climate station data, the last frost date here varies by 83 days year to year — ranging from January 13 in warm years to April 6 in cold years. The growing season is trending shorter by about 3.15 days per decade. San Francisco County scores 41/100 (Moderate) on the Microclimate Index.
🌡️ Zone
10b (°F to °F min)
❄️ Last Frost
February 23
🍂 First Frost
November 27
📅 Growing Season
278 days
⛰️ Elevation
412 ft
🌧️ Annual Rainfall
13.5 in
Monthly Watering Calendar
When you'll need to water your garden — based on average monthly rainfall vs. the ~1 inch/week most gardens need.
View detailed monthly data
| Month | Avg Rainfall | Rainy Days | Extra Water Needed | Watering Effort |
|---|---|---|---|---|
| Jan | 2.3 in | 8 days | 2 in | High |
| Feb | 3.1 in | 10 days | 1.2 in | Moderate |
| Mar | 2.2 in | 8 days | 2.1 in | High |
| Apr | 1.2 in | 5 days | 3.1 in | Critical |
| May | 0.3 in | 1 days | 4 in | Critical |
| Jun | 0.1 in | 1 days | 4.2 in | Critical |
| Jul | 0 in | 0 days | 4.3 in | Critical |
| Aug | 0 in | 0 days | 4.3 in | Critical |
| Sep | 0.1 in | 1 days | 4.2 in | Critical |
| Oct | 0.6 in | 3 days | 3.7 in | Critical |
| Nov | 1.4 in | 6 days | 2.9 in | High |
| Dec | 2.1 in | 8 days | 2.2 in | High |
Annual total: 13.4 in. Water needs vary by crop — tomatoes need ~1.2"/week while herbs like rosemary need only 0.3"/week. Check individual plant pages for crop-specific water budgets that factor in your county's rainfall and soil drainage.
San Francisco County Soil Profile
Soil Type
Loam
Soil pH
6.2-7.2
Drainage
Well Drained
Frost Risk Probability
Based on 29 years of NOAA weather station data from 3 stations
Beginners: Plant frost-sensitive crops (tomatoes, peppers, squash) after the "Safe" date on the left. Harvest or cover them before the "Protect by" date on the right. Hardy crops (lettuce, peas, kale) can go in the yellow transition zones.
How to read this table: "Conservative" means you're safe from frost 9 out of 10 years — best for beginners and frost-sensitive crops. "Average year" is the typical date. "Aggressive" means only 1 in 10 years is that warm — experienced gardeners with frost protection can try these dates.
| Planting Strategy | Last Spring Frost | First Fall Frost | Frost-Free Days |
|---|---|---|---|
| Conservative (safest) | Apr 6 | Dec 21 | 259 days |
| Cautious | Mar 4 | Dec 7 | 278 days |
| Average year | Feb 23 | Nov 27 | 277 days |
| Optimistic | Feb 2 | Nov 22 | 293 days |
| Aggressive (risky) | Jan 13 | Nov 8 | 299 days |
Not very — frost dates can vary by ±83 days year-to-year. Use the "Conservative" row in the table below, and keep row covers handy for surprise late frosts.
Yes — growing seasons are getting shorter here (about 3.2 days per decade). Use the "Conservative" dates and choose fast-maturing varieties.
Gardening Difficulty Score
San Francisco County presents some gardening challenges. Choose adapted varieties and plan around frost dates.
Local Gardening Help in San Francisco County
Free expert help is closer than you think. Your county's cooperative extension office connects you with trained gardeners, soil testing labs, and local programs — all specific to San Francisco County's climate and soil.
County Extension Office
San Francisco County University of California Cooperative Extension Extension Office
Phone: 530-750-1200
Visit Extension Office Website →
Extension offices are run by land-grant universities and funded by the USDA. Their advice is free, research-based, and tailored to your county's specific conditions.
Master Gardener Program
Free gardening help from trained volunteers
Master Gardeners are community volunteers who complete 40–60 hours of university horticultural training. They answer gardening questions, diagnose plant problems, and offer workshops — all free.
Many extension offices run a Master Gardener hotline where you can call or email with photos of plant problems for free diagnosis.
Soil Testing
Available through your extension office
Before amending your soil, get it tested. Your extension office offers soil testing (typically $10–$25) that tells you exact pH, nutrient levels, and amendment recommendations specific to what you want to grow.
Services Available in San Francisco County
Finding local nurseries & garden centers in San Francisco County
Why Buy Local
Local nurseries carry plants that are proven to grow in your area. Staff can give you advice specific to San Francisco County's soil and climate that big-box stores can't. Plants from local growers are typically hardier because they're already acclimated to your zone.
How to Find Them
Search for "nurseries near San Francisco County CA" or "garden center San Francisco County" on Google Maps. Also check with your extension office — they often maintain lists of reputable local nurseries and plant sales.
Community gardens & gardening groups
Community gardens are a great way to learn from experienced gardeners in your area, especially if you're limited on space. Search "community garden San Francisco County CA" or check your extension office and local parks department. Facebook groups like "San Francisco County Gardeners" or "California Gardening" are also excellent for local advice and plant swaps.
What to Plant After Your Harvest
After your first crops finish, use the remaining frost-free days to grow a second round.
Show 6 more succession options
Sunlight & Day Length
Monthly daylight hours and peak sun — critical for onion varieties, photoperiod-sensitive plants, and solar garden planning.
Longest Day
14.6 hours
Summer solstice daylight
Shortest Day
9.4 hours
Winter solstice daylight
Peak Sun Hours
13.8 hr/day peak (summer)
Peak sun hours (green dashed line below) account for cloud cover — this is the usable direct sunlight your garden actually receives. Most vegetables need 6+ peak sun hours.
Onion tip: Your long summer days (14+ hours) support long-day onion varieties like Walla Walla, Sweet Spanish, and Ailsa Craig.
View detailed monthly data
| Month | Daylight Hours | Peak Sun Hours | Day Length |
|---|---|---|---|
| January | 9.7 hr | 5.4 hr | Short day |
| February | 10.6 hr | 6.1 hr | Short day |
| March | 11.7 hr | 7.9 hr | Short day |
| April | 13 hr | 9.6 hr | Neutral |
| May | 14 hr | 11.3 hr | Long day |
| June | 14.6 hr | 13 hr | Long day |
| July | 14.4 hr | 13.8 hr | Long day |
| August | 13.5 hr | 12.6 hr | Neutral |
| September | 12.2 hr | 10.2 hr | Neutral |
| October | 11 hr | 8.1 hr | Short day |
| November | 9.9 hr | 5.9 hr | Short day |
| December | 9.4 hr | 5.3 hr | Short day |
Peak sun hours factor in typical cloud cover — use these for solar panel and shade-planning calculations.
Soil Temperature & Composting Calendar
Monthly soil temps tell you when to plant warm-season crops, and when your compost pile is actively working.
Plant Warm Crops When
Soil reaches 60°F+
Soil warm enough from Feb through Dec.
Best Month to Compost
Apr
Microbial activity peaks when soil is warm.
Active Composting
12 months
Nearly year-round composting.
View detailed monthly data
| Month | Soil 4" Deep | Soil 8" Deep | Compost Activity | Time to Finish |
|---|---|---|---|---|
| Jan | 55°F | 62°F | ♻️ Active | ~14 weeks |
| Feb | 60°F | 63°F | ♻️ Active | ~14 weeks |
| Mar | 64°F | 66°F | ♻️ Active | ~14 weeks |
| Apr | 73°F | 72°F | 🔥 Peak | ~8 weeks |
| May | 78°F | 77°F | 🔥 Peak | ~8 weeks |
| Jun | 85°F | 84°F | 🔥 Peak | ~8 weeks |
| Jul | 94°F | 89°F | 🔥 Peak | ~8 weeks |
| Aug | 96°F | 91°F | 🔥 Peak | ~8 weeks |
| Sep | 90°F | 90°F | 🔥 Peak | ~8 weeks |
| Oct | 82°F | 84°F | 🔥 Peak | ~8 weeks |
| Nov | 72°F | 76°F | 🔥 Peak | ~8 weeks |
| Dec | 60°F | 67°F | ♻️ Active | ~14 weeks |
Highlighted rows = soil 60°F+ (safe for warm-season transplants). Compost finishes fastest during peak activity months.
Pest & Disease Pressure in San Francisco County
Computed from local climate patterns — warmer, humid conditions increase pest generations and fungal disease risk.
Insect Pest Pressure
High — expect multiple pest generations. Preventative measures essential.
Disease Risk
Low disease risk — dry conditions reduce fungal problems.
Seasonal Risk
View 6 common pests in your area
| Pest | Risk Level | Peak Months |
|---|---|---|
| Aphids | High | Jan, Feb, Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov, Dec |
| Whiteflies | High | Jan, Feb, Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov, Dec |
| Spider mites | High | Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov |
| Thrips | High | Mar, Apr, May, Jun, Jul, Aug, Sep |
| Scale insects | Moderate | Apr, May, Jun, Jul, Aug, Sep, Oct |
| Nematodes | Moderate | May, Jun, Jul, Aug, Sep |
Organic pest management tips
- Use row covers on susceptible crops during peak pest months
- Apply neem oil preventatively every 7-14 days during active pest season
- Interplant with strong-scented herbs (basil, marigold) to confuse pests
- Hand-pick larger pests (beetles, caterpillars) in early morning when they're sluggish
- Practice crop rotation — never plant the same family in the same spot within 3 years
Cover Crops for San Francisco County
Cover crops protect bare soil, fix nitrogen, suppress weeds, and improve soil structure — with county-specific planting dates.
Spring Cover Crops (4 options) — Build soil before the main growing season
| Crop | Plant By | Terminate | N-Fixing | Soil Benefit |
|---|---|---|---|---|
| Buckwheat | Feb 28 | Sep 18 | — | Rapid growth, attracts pollinators, suppresses weeds |
| Cowpeas (southern peas) | Feb 28 | Sep 18 | ✓ Yes | Excellent nitrogen fixer for warm climates, edible |
| Sorghum-sudan grass | Feb 25 | Sep 25 | — | Massive biomass, breaks compaction, suppresses nematodes |
| White clover | Jan 27 | Sep 18 | ✓ Yes | Living mulch, fixes nitrogen, permanent ground cover |
Summer Cover Crops (1 options) — Fill gaps and suppress weeds between plantings
| Crop | Plant By | Terminate | N-Fixing | Soil Benefit |
|---|---|---|---|---|
| Sunflowers | Mar 8 | Nov 6 | — | Deep roots break compaction, attract pollinators and beneficial insects |
Fall Cover Crops (1 options) — Plant after harvest to protect soil over winter
| Crop | Plant By | Terminate | N-Fixing | Soil Benefit |
|---|---|---|---|---|
| Crimson clover | Sep 22 | Feb 9 | ✓ Yes | Fixes nitrogen, attracts pollinators in spring |
Wind & Microclimate
Wind dries soil, stresses plants, and affects frost patterns. Understanding your exposure helps with garden placement.
Seasonal Wind Speed
Spring: 11 mph Summer: 10 mph
Fall: 9 mph Winter: 11 mph
Prevailing wind: W. Moderate wind — consider a temporary windbreak for young seedlings.
Windbreak Benefit
5.1/10
Moderately beneficial — a simple fence or trellis can protect delicate crops from wind stress.
Frost Pocket Risk
Moderate
Some terrain variation (712 ft range). Garden on slopes or higher ground if possible to avoid late-season frost pockets.
Rainwater Harvesting Potential
How much water you can collect, when to collect it, and what size system you need for your garden.
Annual Collection
6,678 gal
Per 1,000 sq ft of roof area (at 80% collection efficiency)
Recommended Setup
8 rain barrels (55 gal each)
For a typical 500 sq ft garden. Serious collectors: consider a 2,500 gal tank.
Legal Status
Unrestricted
Rainwater harvesting is fully legal in your state with no restrictions.
Best Collection Months
Jan, Feb, Mar, Dec
Highest rainfall months — your barrels will fill up quickly during these months.
Months to Draw From Storage
May, Jun, Jul, Aug, Sep, Oct
Dry months when you'll rely on stored water — size your storage for this gap.
Rainwater collection tips for your area
- Your county receives approximately 13.4 inches of rain per year
- A 1,000 sq ft roof can collect roughly 6,678 gallons annually
- Rainwater harvesting is fully legal in your state
- In your dry climate, every drop counts — consider a larger cistern system
- Position collection tanks in shade to reduce evaporation and algae growth
Soil & Growing Conditions in San Francisco County
Soil Type
Loam
Soil pH 6.2–7.2 · Moderately Well Drained drainage
Native soil is well-suited to most vegetables and herbs with regular compost additions.
Watering Needs
Drought stress: 7.5/10
High drought stress. Consistent irrigation is essential — consider drip systems, heavy mulch, and drought-tolerant varieties.
Season Tips
278-day frost-free season
Your long season supports multiple successions and heat-demanding crops like melons, sweet potatoes, and peppers. Plant warm-season crops as soon as soil warms.
Your Free Printable Garden Planner
Plan every bed, every planting, every harvest — in one place. This 24-page printable includes your zone's planting calendar, a month-by-month task list, a seed inventory tracker, a harvest log, and succession-planting charts. Built to print, write in, and actually use all season.
Recommended for Your Garden
Reduce heat stress and sun scorch in hot climates with UV-stabilized shade cloth.
Test your soil pH, nitrogen, phosphorus, and potassium levels before planting.
Get instant, accurate soil pH readings to fine-tune your amendments.
🥬 Vegetables to Grow in San Francisco County
106 vegetables that grow well in Zone 10b with planting dates for San Francisco County.
Show all 106 vegetables with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Harvest | Days to Maturity |
|---|---|---|---|---|---|
| Acorn Squash | Jan 26 | Feb 23 | Mar 2 | May 25 – Jun 29 | 80–100 |
| Amaranth | Jan 12 | Feb 23 | Mar 2 | Jun 1 – Jul 20 | 90–120 |
| Artichoke | — | — | Mar 9 | Jul 13 – Sep 21 | 120–180 |
| Arugula | Jan 26 | Feb 2 | Feb 23 | Mar 30 – Jun 1 | 30–50 |
| Asparagus | — | — | Mar 9 | — | 730–1095 |
| Beets | — | Feb 2 | — | Mar 30 – Apr 27 | 50–70 |
| Belgian Endive | Jan 26 | Feb 2 | Feb 23 | Jun 15 – Aug 10 | 110–150 |
| Bitter Melon | Jan 12 | Feb 23 | Mar 2 | May 4 – Jun 15 | 60–90 |
| Black Beans | — | Mar 2 | — | Jun 1 – Jul 20 | 90–120 |
| Bok Choy | Jan 26 | Feb 2 | Feb 23 | Apr 6 – May 11 | 40–60 |
| Broccoli | Jan 26 | Feb 2 | Feb 23 | Apr 27 – Jun 8 | 60–90 |
| Broccoli Rabe | Jan 26 | Feb 2 | Feb 23 | Apr 6 – May 11 | 40–60 |
| Brussels Sprouts | Jan 26 | Feb 2 | Feb 23 | May 25 – Jul 20 | 90–130 |
| Butternut Squash | Jan 26 | Feb 23 | Mar 2 | Jun 1 – Jul 6 | 85–110 |
| Cabbage | Jan 26 | Feb 2 | Feb 23 | Apr 27 – Jun 22 | 60–100 |
| Calabash | Jan 12 | Feb 23 | Mar 2 | May 25 – Jul 20 | 80–120 |
| Cardoon | — | — | Mar 9 | Jul 13 – Aug 24 | 120–150 |
| Carrots | — | Feb 2 | — | Apr 6 – May 11 | 60–80 |
| Cauliflower | Jan 26 | Feb 2 | Feb 23 | Apr 20 – Jun 22 | 55–100 |
| Celery | Jan 26 | Feb 2 | Feb 23 | May 18 – Jul 13 | 80–120 |
| Celtuce | Jan 26 | Feb 2 | Feb 23 | Apr 27 – Jun 8 | 60–90 |
| Chard | Jan 26 | Feb 2 | Feb 23 | Apr 20 – Jun 8 | 50–60 |
| Chayote | Jan 12 | Feb 23 | Mar 2 | Jul 6 – Sep 14 | 120–180 |
| Chickpeas | Jan 26 | Feb 2 | Feb 23 | May 18 – Jun 29 | 80–110 |
| Chicory | Jan 26 | Feb 2 | Feb 23 | Apr 27 – Jun 8 | 60–85 |
| Chinese Cabbage | Jan 26 | Feb 2 | Feb 23 | Apr 20 – May 18 | 50–70 |
| Christmas Lima Beans | Jan 12 | Feb 23 | Mar 2 | May 25 – Jun 29 | 80–100 |
| Collard Greens | Jan 26 | Feb 2 | Feb 23 | Apr 20 – Jun 22 | 55–75 |
| Corn | — | Mar 2 | — | May 4 – Jun 29 | 60–100 |
| Cowpeas | — | Mar 2 | — | May 4 – Jun 15 | 60–90 |
| Cress | Jan 26 | Feb 2 | Feb 23 | Mar 9 – Mar 30 | 14–21 |
| Crookneck Squash | Jan 26 | Feb 23 | Mar 2 | Apr 20 – May 18 | 45–60 |
| Cucumber | Jan 26 | Feb 23 | Mar 2 | Apr 27 – Jun 22 | 50–70 |
| Daikon | — | Feb 2 | — | Mar 30 – Apr 27 | 50–70 |
| Delicata Squash | Jan 26 | Feb 23 | Mar 2 | May 25 – Jun 29 | 80–100 |
| Edamame | — | Mar 2 | — | May 18 – Jun 29 | 75–100 |
| Eggplant | Jan 12 | Feb 23 | Mar 2 | May 11 – Jul 13 | 65–85 |
| Endive | Jan 26 | Feb 2 | Feb 23 | Apr 13 – May 18 | 45–65 |
| Escarole | Jan 26 | Feb 2 | Feb 23 | Apr 20 – May 18 | 50–70 |
| Fava Beans | Jan 26 | Feb 2 | Feb 23 | May 11 – Jun 22 | 75–100 |
| Fennel | Jan 12 | Feb 23 | Mar 2 | May 4 – Jun 15 | 60–90 |
| Ginger | Jan 12 | Feb 23 | Mar 2 | Nov 2 – Jan 11 | 240–300 |
| Green Beans | — | Mar 2 | — | Apr 27 – Jun 22 | 50–65 |
| Hot Peppers | Jan 12 | Feb 23 | Mar 2 | May 11 – Aug 17 | 70–120 |
| Hubbard Squash | Jan 26 | Feb 23 | Mar 2 | Jun 15 – Jul 20 | 100–120 |
| Jicama | Jan 12 | Feb 23 | Mar 2 | Jul 6 – Sep 14 | 120–180 |
| Kabocha | Jan 26 | Feb 23 | Mar 2 | Jun 1 – Jun 29 | 85–100 |
| Kai Lan | Jan 26 | Feb 2 | Feb 23 | Apr 13 – May 11 | 45–60 |
| Kale | Jan 26 | Feb 2 | Feb 23 | Apr 20 – Jun 15 | 50–70 |
| Kidney Beans | — | Mar 2 | — | Jun 1 – Jul 6 | 85–110 |
| Kohlrabi | Jan 26 | Feb 2 | Feb 23 | Apr 13 – May 18 | 45–65 |
| Komatsuna | Jan 26 | Feb 2 | Feb 23 | Mar 30 – May 4 | 35–50 |
| Leeks | Jan 26 | Feb 2 | Feb 23 | May 25 – Aug 10 | 90–150 |
| Lentils | Jan 26 | Feb 2 | Feb 23 | May 18 – Jun 29 | 80–110 |
| Lettuce | Jan 26 | Feb 2 | Feb 23 | Mar 30 – Jun 8 | 30–60 |
| Lima Beans | — | Mar 2 | — | May 4 – Jun 15 | 60–90 |
| Loofah | Jan 12 | Feb 23 | Mar 2 | Jun 15 – Aug 17 | 100–150 |
| Luffa | Jan 12 | Feb 23 | Mar 2 | Jun 1 – Aug 17 | 90–150 |
| Mache | Jan 26 | Feb 2 | Feb 23 | Apr 6 – May 11 | 40–60 |
| Malabar Spinach | Jan 12 | Feb 23 | Mar 2 | Apr 27 – May 25 | 55–70 |
| Melon | Jan 26 | Feb 23 | Mar 2 | May 11 – Jun 29 | 70–100 |
| Microgreens | Jan 26 | Feb 2 | Feb 23 | Mar 2 – Mar 30 | 7–21 |
| Mizuna | Jan 26 | Feb 2 | Feb 23 | Mar 30 – Apr 27 | 30–45 |
| Mustard Greens | Jan 26 | Feb 2 | Feb 23 | Mar 30 – Jun 1 | 30–50 |
| Napa Cabbage | Jan 26 | Feb 2 | Feb 23 | Apr 20 – May 25 | 55–75 |
| New Zealand Spinach | Jan 12 | Feb 23 | Mar 2 | Apr 27 – May 25 | 55–70 |
| Okra | Jan 12 | Feb 23 | Mar 2 | Apr 27 – Jun 22 | 50–65 |
| Onion | Jan 26 | Feb 2 | Feb 23 | May 25 – Jul 13 | 90–120 |
| Pac Choi | Jan 26 | Feb 2 | Feb 23 | Apr 6 – May 4 | 40–55 |
| Patty Pan Squash | Jan 26 | Feb 23 | Mar 2 | Apr 20 – May 18 | 45–60 |
| Peas | Jan 26 | Feb 2 | Feb 23 | Apr 20 – Jun 15 | 55–70 |
| Peppers | Jan 12 | Feb 23 | Mar 2 | May 4 – Jul 13 | 60–90 |
| Pole Beans | Jan 12 | Feb 23 | Mar 2 | Apr 27 – Jun 22 | 55–70 |
| Potatoes | Jan 12 | Feb 23 | Mar 2 | May 11 – Jul 20 | 70–120 |
| Pumpkin | Jan 26 | Feb 23 | Mar 2 | Jun 1 – Jul 20 | 85–120 |
| Purslane | Jan 26 | Feb 2 | Feb 23 | Apr 6 – May 11 | 40–60 |
| Radicchio | Jan 26 | Feb 2 | Feb 23 | Apr 27 – Jun 1 | 60–80 |
| Radish | — | Feb 2 | — | Mar 2 – Mar 23 | 22–35 |
| Romanesco | Jan 26 | Feb 2 | Feb 23 | May 11 – Jun 22 | 75–100 |
| Savoy Cabbage | Jan 26 | Feb 2 | Feb 23 | May 4 – Jun 29 | 70–110 |
| Scallions | Jan 26 | Feb 2 | Feb 23 | Apr 20 – May 18 | 50–70 |
| Scarlet Runner Beans | Jan 12 | Feb 23 | Mar 2 | May 4 – Jun 8 | 60–80 |
| Shallot | Jan 26 | Feb 2 | Feb 23 | May 25 – Jul 13 | 90–120 |
| Shiso | Jan 12 | Mar 2 | Mar 2 | Apr 27 – Jun 22 | 50–70 |
| Snap Peas | Jan 12 | Feb 23 | Mar 2 | Apr 27 – Jun 22 | 55–70 |
| Snow Peas | Jan 26 | Feb 2 | Feb 23 | Apr 20 – Jun 15 | 50–65 |
| Soybeans | — | Mar 2 | — | May 25 – Jul 20 | 80–120 |
| Spaghetti Squash | Jan 26 | Feb 23 | Mar 2 | Jun 1 – Jun 29 | 85–100 |
| Spinach | Jan 26 | Feb 2 | Feb 23 | Mar 30 – Jun 1 | 35–50 |
| Squash (Summer) | Jan 26 | Feb 23 | Mar 2 | Apr 20 – Jun 22 | 45–65 |
| Squash (Winter) | Jan 26 | Feb 23 | Mar 2 | May 25 – Jul 20 | 80–120 |
| Sunflower | Jan 12 | Feb 23 | Mar 2 | May 11 – Jun 29 | 70–100 |
| Sweet Corn | — | Mar 2 | — | May 4 – Jun 15 | 60–90 |
| Sweet Potatoes | Jan 12 | Feb 23 | Mar 2 | Jun 1 – Jul 20 | 90–120 |
| Tatsoi | Jan 26 | Feb 2 | Feb 23 | Mar 30 – May 4 | 35–50 |
| Tomatillo | Jan 12 | Feb 23 | Mar 2 | May 4 – Jul 13 | 60–85 |
| Tomatoes | Jan 12 | Feb 23 | Mar 2 | May 4 – Jul 13 | 60–85 |
| Turmeric | Jan 12 | Feb 23 | Mar 2 | Nov 2 – Jan 11 | 240–300 |
| Turnip | — | Feb 2 | — | Mar 16 – Apr 20 | 40–60 |
| Watercress | Jan 26 | Feb 2 | Feb 23 | Apr 6 – May 11 | 40–60 |
| Watermelon | Jan 26 | Feb 23 | Mar 2 | May 11 – Jun 29 | 70–100 |
| Wax Beans | — | Mar 2 | — | Apr 27 – Jun 22 | 50–65 |
| Winter Melon | Jan 12 | Feb 23 | Mar 2 | Jun 1 – Jul 20 | 90–120 |
| Yam | Jan 12 | Feb 23 | Mar 2 | Aug 31 – Feb 15 | 180–330 |
| Yard Long Beans | Jan 12 | Feb 23 | Mar 2 | Apr 27 – Jun 8 | 55–80 |
| Zucchini | Jan 26 | Feb 23 | Mar 2 | Apr 20 – Jun 15 | 45–60 |
🍓 Fruits to Grow in San Francisco County
16 fruits that grow well in Zone 10b with planting dates for San Francisco County.
Show all 16 fruits with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Harvest | Days to Maturity |
|---|---|---|---|---|---|
| Alpine Strawberries | — | — | Mar 9 | Jun 8 – Sep 21 | 90–180 |
| Blackberries | — | — | Mar 9 | — | 365–730 |
| Boysenberries | — | — | Mar 9 | — | 365–730 |
| Cantaloupe | — | — | Mar 9 | May 18 – Jun 22 | 70–90 |
| Che Fruit | — | — | Mar 9 | — | 1095–1825 |
| Dragon Fruit | — | — | Mar 9 | — | 365–730 |
| Figs | — | — | Mar 9 | — | 730–1825 |
| Goji Berries | — | — | Mar 9 | — | 730–1095 |
| Grapes | — | — | Mar 9 | — | 730–1095 |
| Ground Cherry | — | — | Mar 9 | May 18 – Jul 13 | 65–80 |
| Guava | — | — | Mar 9 | — | 365–730 |
| Honeydew | — | — | Mar 9 | Jun 1 – Jul 13 | 80–110 |
| Loquat | — | — | Mar 9 | — | 730–1825 |
| Passion Fruit | — | — | Mar 9 | — | 365–545 |
| Pomegranate | — | — | Mar 9 | — | 730–1095 |
| Strawberries | — | — | Mar 9 | Jun 8 – Mar 8 | 90–365 |
🌿 Herbs to Grow in San Francisco County
23 herbs that grow well in Zone 10b with planting dates for San Francisco County.
Show all 23 herbs with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Harvest | Days to Maturity |
|---|---|---|---|---|---|
| Anise | Jan 26 | Feb 2 | Feb 16 | May 18 – Aug 3 | 90–120 |
| Basil | Jan 12 | Mar 2 | Mar 2 | Apr 27 – Jun 29 | 50–75 |
| Borage | Jan 26 | Feb 2 | Feb 16 | Apr 13 – Jun 1 | 50–60 |
| Chervil | Jan 26 | Feb 2 | Feb 16 | Mar 30 – Jun 1 | 40–60 |
| Chives | — | — | Mar 2 | May 4 – Jul 13 | 60–90 |
| Cilantro | Jan 26 | Feb 2 | Feb 16 | Mar 30 – Jun 1 | 40–60 |
| Cumin | Jan 26 | Feb 2 | Feb 16 | Jun 1 – Aug 3 | 100–120 |
| Dill | Jan 26 | Feb 2 | Feb 16 | Mar 30 – Jun 1 | 40–60 |
| Epazote | Jan 12 | Mar 2 | Mar 2 | Apr 20 – Jun 15 | 45–60 |
| Fennel (herb) | Jan 26 | Feb 2 | Feb 16 | Apr 20 – Jun 29 | 60–90 |
| Garlic Chives | — | — | Mar 2 | May 4 – Jul 13 | 60–90 |
| Horehound | — | — | Mar 2 | May 18 – Jul 13 | 75–90 |
| Lemon Verbena | Jan 12 | Mar 2 | Mar 2 | May 4 – Jul 13 | 60–90 |
| Lemongrass | Jan 12 | Mar 2 | Mar 2 | May 18 – Aug 17 | 75–120 |
| Marjoram | — | — | Mar 2 | May 4 – Jul 13 | 60–90 |
| Mint | — | — | Mar 2 | May 4 – Jul 13 | 60–90 |
| Oregano | — | — | Mar 2 | May 4 – Jul 13 | 60–90 |
| Parsley | Jan 26 | Feb 2 | Feb 16 | Apr 20 – Jun 22 | 60–80 |
| Rosemary | — | — | Mar 2 | May 25 – Oct 12 | 80–180 |
| Sage | — | — | Mar 2 | May 18 – Jul 13 | 75–90 |
| Savory | — | — | Mar 2 | Apr 27 – Jun 22 | 50–70 |
| Stevia | Jan 12 | Mar 2 | Mar 2 | May 4 – Jul 13 | 60–90 |
| Thai Basil | Jan 12 | Mar 2 | Mar 2 | Apr 27 – Jun 29 | 50–75 |
Monthly Planting Guide for San Francisco County
Gardening Guides & Resources
Helpful guides from The Ultimate Homestead to improve your garden in San Francisco County.
Frequently Asked Questions
What planting zone is San Francisco County, CA?
San Francisco County is in USDA Hardiness Zone 10b. This zone classification determines which perennial plants survive winter and sets the baseline for frost timing across the county.
When is the last frost in San Francisco County, CA?
Based on 29 years of NOAA weather station data, the median last spring frost in San Francisco County falls around February 23. In 8 out of 10 years, last frost lands between January 13 and April 6 — a 83-day window of variability. Use April 6 as your conservative safe-to-plant date for frost-sensitive crops.
When is the first fall frost in San Francisco County, CA?
The median first fall frost in San Francisco County arrives around November 27. In cold years it can arrive as early as November 8; in mild years as late as December 21. Harvest or protect frost-sensitive crops — tomatoes, peppers, basil, squash — before this date.
How long is the growing season in San Francisco County?
San Francisco County has a frost-free growing season of approximately 278 days. This long season supports multiple succession plantings and warm-season crops that need extended heat, like sweet potatoes and melons. Climate records show the growing season is trending shorter by about 3.15 days per decade.
What is the soil like in San Francisco County for gardening?
San Francisco County has predominantly Loam soil with a pH range of 6.2–7.2 and Moderately Well Drained drainage. Most vegetables and herbs grow well with standard composting and seasonal soil amendment.
What is grown commercially in San Francisco County?
San Francisco County has commercial agriculture that includes Almonds, Grapes, Dairy. These crops reflect the local climate and soil conditions — what succeeds commercially often translates well to home gardens in the same area.
Is San Francisco County a good location for home gardening?
San Francisco County scores 41/100 (Moderate) on our Microclimate Index, which combines frost reliability, drought pressure, soil challenge, elevation risk, and long-term climate trend. Gardening here benefits from close attention to frost timing and season extension due to the challenging microclimate factors.
Your San Francisco County Garden Planner — Free
A 24-page printable planner built for San Francisco County (Zone 10b). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.
The Gardener's Encyclopedia to Companion Planting
The pairings that make vegetables, herbs, and flowers grow better — and the ones that quietly wreck a bed.
- Proven pairings for 200+ vegetables, herbs, flowers, and fruits
- Full seed-starting + planting schedule with timing and spacing
- Bonus: square-foot gardening guide + printable seasonal planners
Seed Saving & Storage Guide
Most saved seeds go bad before next season. This shows exactly when to pick, how to dry, and where to store seeds from 200 plants so yours don't.
- 200 plants, step-by-step: life cycle, pollination type, isolation
- Exact temperature + humidity ranges that keep seeds viable
- Bonus: searchable Google Sheets tracker + custom GPT assistant
Composting Guide for Homesteaders
Turn kitchen scraps and yard waste into compost that actually feeds the garden — instead of a pile that smells, attracts pests, and never breaks down.
- 14 sections on composting methods, soil science, and troubleshooting
- The 7-step hot-compost system from start to finish
- Bonus tools: troubleshooting chart, safety guide, monitoring log